Flooding Control and Emergency Repairs

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Flooding Control and Emergency Repairs

• Lesson Topic 3.3

2
Enabling Objectives

• Discuss the coordination of the following repair
  station teams Plugging, Pipe patching,
  Dewatering, Shoring.
• Select the procedures necessary to control and
  repair damage to shipboard equipment and systems
  .
• Record damage control messages

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Flooding Indications, causes and Sources

• Indications of Flooding
• Loss of pressure
• Reduction in level of water or fuel in tanks
• list of ship
• Soundings
• Alarm systems
• Visual indications

4

• Battle damage
• Small/large holes
• Punctured, weakened bulkheads
• warped/sprung doors hatches
• Ruptured/cracked pipes
• ruptured/weaken decks

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Flooding Indications, causes and Sources

• Causes of flooding
• Sea damage
• Hurricanes
• Typhoons
• Tropic storms
• Carelessness
• water tight integrity
• maintain material conditions
• sound tanks and voids

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Collisions at sea!!
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Flooding Indications, causes and Sources

• Types of flooding
• Solid
• Partial, not completely flooded
• Free surface exists
• Effects of pressure on flooding
• Inward pressure on a hole submerged is .444
  Pounds Per Square Inch (PSI) for every foot of
  depth in saltwater

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Flooding Indications, causes and Sources

• Effects of Securing Sources of Flooding
• Hasty deactivation may cause interference with
  fire fighting operations
• Careful evaluation required prior to securing any
  systems

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Establishing Flooding Boundaries

• Use the same theory as fire boundaries, except
  all boundaries are watertight
• Repair party personnel and investigators must
  keep re-inspecting after setting boundaries

10
Controlling Flooding using Portable and Installed
Dewatering Systems

• Drainage systems
• Total output of pumping equipment must be greater
  than flow of water into the compartment
• The most practical goal is to reduce flow enough
  to permit effective pumping

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Controlling Flooding using Portable and Installed
Dewatering Systems

• Drainage System include
• Main drainage
• Secondary drainage
• Plumbing, gravity and deck drains

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Controlling Flooding using Portable and Installed
Dewatering Systems

• Overboard discharge connections
• Allow discharge of liquids through the hull of
  the ship
• Located on DC deck or as close to the DC deck as
  practicable
• Port and starboard sides
• Flush with outer hull surface

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Overboard discharge connections

• Size and type
• 4" female swivel hose connection
• 2 1/2" fire hose connection
• A spanner wrench is stored on station

14
Controlling Flooding using Portable and Installed
Dewatering Systems

• Eductors
• Jet-type pumps that contain no moving parts
• Used for pumping liquids that cannot be handled
  directly by portable pumps
• Can handle liquids that contain fairly small
  particles of foreign matter

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Eductors

• Peri-jet
• Six jets around vacuum chamber
• Straight bore of 2 1/2 inches
• Allow debris up to 2 1/2 inches in diameter to
  pass through

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Peri Jet Eductor
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Peri Jet Eductor cut-away
3 suction
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Peri Jet Eductor cut-away
4 discharge
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Peri Jet Eductor cut-away
2 1/2 unobstructed boar
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Peri Jet Eductor cut-away
2 1/2 supply
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Peri Jet Eductor cut-away
6 jets
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Eductors

• S-type
• One jet in vacuum chamber
• Foot valve
• Strainer attached and must be raised and lowered
  when it clogs with debris
• 1 1/2 inch size available

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S type Eductor
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S-type eductor cut-away
4 discharge
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S-type eductor cut-away
2 1/2 supply
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S-type eductor cut-away
1 jet
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S-type eductor cut-away
Foot valve
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S-type eductor cut-away
Basket strainer installed on bottom
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Eductors

• Both eductors have
• 4 inch discharges
• Firemain pressure as motive power
• 2 1/2 inch fire hose connections
• Portable or fixed

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Eductors

• Pressure of water supplied must be greater than
  the pressure against which the eductor must
  discharge

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P-100 portable pump

• Fire fighting limited dewatering operations
• 100 GPM at 83 PSI
• Suction lift is 20

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P-100 portable pump

• P-100 engine
• Diesel engine
• Single Cylinder engine
• Four cycle
• Air cooled
• Fuel injected
• 10 horse power at 3830 rpms

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P-100 portable fire fighting pump
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P-100 portable fire fighting pump
Fuel tank 1.45 gal
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P-100 portable fire fighting pump
Fuel pet cock valve
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P-100 portable fire fighting pump
Recoil starter
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P-100 portable fire fighting pump
Run/start stop lever
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P-100 portable fire fighting pump
Oil check
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P-100 portable fire fighting pump
3 suction
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P-100 portable fire fighting pump
2 1/2 discharge
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P-100 portable fire fighting pump
Compound pressure gauge
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P-100 portable fire fighting pump
Exhaust
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Portable electric submersible pump

• 3 phase 440 volt AC
• Pump uncontaminated fresh or salt water
• Not designed to pump gasoline, heavy oils or hot
  water
• DFM, JP-5 Navy Distillate (ND) may be pumped
  safely in emergency situations with Chief
  Engineers Permission

44
Portable electric submersible pump

• Capacities
• 200 GPM at a 50 static head
• 140 GPM at a 70 static head
• Suction lift of 20
• Operation
• Used in tandem to increase static head
• Keep pump submerge while in operation
• Keep strainer clean

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Electrical submersible pump
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Electrical submersible pump
2 1/2 discharge
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Electrical submersible pump
Basket strainer
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Electrical submersible pump
Control box
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Electrical submersible pump
Power cord with control line
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Emergency Repair to Decks and Bulkheads using
Plugs

• Two general methods for repairing holes
• Put something into it
• Put something over it
• Temporary patch not always watertight
• No one type of plug/patch is correct for all
  types of leaks

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Wooden plugs

• Simplest method
• Made of soft wood
• Douglas fir
• yellow pine
• Not painted
• Combinations of plugs may be used

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Emergency Repair to Decks and Bulkheads using
Plugs

• Pillows, mattresses
• Pillows and mattresses can be rolled up
• Cannot be relied upon

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Wooden box patch

• Used for holes up to 4 feet square and one foot
  deep
• Can be shaped to fit corrugations or
  rippled plating
• Used on holes protruding
• inward

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Box patches

• Metal box patch
• Holes up to 18 square and 6 deep
• Suited for holes with jagged edges protruding
  inward
• Shored or welded in place

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Patches for cracks and split seams

• Drill/cut 1/4 hole at each end of crack
• Apply gasket over length of crack
• Shore with sholes or strongback to hold gasket
• Use caulking, oakum, cloth, marlin, canvas, for
  split seams or cracks

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Cofferdams

• Small compartment inside a larger one
• Used around extra large holes
• Used around enclosures such as hatches, trunks,
  and doors
• Used to enter a compartment below a flooded space

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Emergency Pipe Repairs

• Types of ruptures
• Simple
• Elbow
• Severed
• Compound
• Types of patches
• Jubilee pipe patch
• Prefabricated sheet metal collar secured over
  packing with bolts or clamps
• Holds upwards of 100 PSI

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Jubilee Patch

• 1. Secure pressure if possible
• 2. Remove rough edges if possible

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Jubilee Patch
3.Place Patch down stream from rupture, nut side
down
4 5. Slide Patch Over Rupture, and Center.
Equalize spray from sides of patch.
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Jubilee Patch (Cont..)

• 6. Tighten bolt with adjustable wrench until flow
  ceases.
• 7. Holds pressure upwards of 100 PSI.

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Emergency Pipe Repairs

• Soft patch
• Used to repair small holes/cracks piping
• 150 PSI or less
• How to install soft patches
• Secure pressure, Remove rough edges
• Insert wedge(s) into rupture
• Mark wedge, Remove wedge cut 1/2 below mark
• Tap wedge back into rupture, use a rag or oakum
  with wedge

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How to install soft patches

• Cut off excess of wedge flush with pipe
• Gasket, 2 overlap on both sides and a 1/4 gap at
  bottom
• Place rubber over rupture
• Start wrapping with marlin at center and overlap
  patch 1/2 inch on both sides
• Tie off marlin and test

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Soft Patch
2. Remove Rough Edges.
1. Secure Water
3.Insert Wedge or Plug, Mark Even With Pipe
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Soft Patch
4. Remove Wedge and Cut.
5. Hammer Wedge and Rag into pipe
7. Place Rubber Sheet Over Damage
6. Cut Flush With Pipe.
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Soft Patch
9. Wrap with Marlin, Starting with center
10. Make 2 Tight Wraps
11. Tie off at center
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Band-it-Patch

• A comparatively simple patch to install. Used
  primarily on fresh and saltwater systems.
  Produces a very effective repair.
• A. Equipment
• 1. Band-it Tool
• 2. 100 ft roll of strapping
• 3. Banding Clips
• 4. Rubber sheet
• 5. Metal Backing Plate
• 6. Face shield
• 7. Gloves

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Emergency Pipe Repairs

• Banding kit
• Used to repair small holes or cracks piping
• 150 PSI or less
• How to install a banding patch
• Secure pressure and remove rough edges
• Place rubber gasket over hole, 2 inch overlap on
  all sides
• Place metal plate over gasket
• Place bands over patch and secure with tool and
  test

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Emergency Pipe Repairs

• Emergency water activated repair patch(EWARP)
• Size 1, 2" X 5' 10 packs per box
• Size 2, 4" X 15' 10 packs per box
• Latex gloves
• safety glasses
• Instructional sheet
• Fiberglass gauze type material
• Shelf Life - 24 Months

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Emergency water activated repair patch(EWARP)

• Repair process
• Remove loose rust, scale, jagged and protruding
  edges
• Put on plastic gloves and glasses
• Immerse in fresh water for 20 seconds and wrap
  around pipe
• Patch will become solid in 15 minutes with 30
  minute cure time

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Emergency water activated repair patch(EWARP)

• EWARP advantages
• Applied to piping systems, fittings, and can be
  used to repair cracks small holes
• Excellent adhesive qualities when applied to
  steel and copper materials
• Fresh water, except potable water inlet lines,
  salt water, hydraulic and lubricating oils
• Not used on steam or fuel lines

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Emergency water activated repair patch(EWARP)

• EWARP advantages
• Maximum pressure of 150 PSI
• Maximum temperature 300 degrees Fahrenheit
• Safety precautions
• Wear gloves and safety glasses
• Avoid contact with unprotected areas of skin or
  eyes.
• Consult MSDS for additional information

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Summary and Review

• Flooding Indications, Causes, and Sources
• Effects of Pressure on Flooding
• Effects of Securing Sources of Flooding
• Effects of Establishing Flooding Boundaries
• Controlling Flooding using Portable and Installed
  Dewatering Systems
• Emergency Repair to Decks and Bulkheads using
  Plugs

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Summary and Review

• Emergency Repairs to Decks and Bulkheads using
  Patches
• Emergency Pipe Repairs